I have a couple that I've told before under various usernames.
When I was little I woke up one night to feel feet pressed against mine, sole to sole, like when you top and tail with a friend sleeping over. I wriggled my toes and the other feet wriggled theirs. I pushed against them and they pushed back. I scuffled my feet around, playing a game, and the other feet joined in. They were definitely feet and not the wall or the door because they moved, I could feel toes and skin against my toes and skin, and they were mildly chilly. I presumed it was my little brother, we shared a room and he would sometimes get into my bed if he had a bad dream or went to the loo in the night and didn't feel like walking back to his own bed (I was nearest the door). After playing for a while I happened to glance over to see him fast asleep in his bed. I felt instantly petrified and didn't have the nerve to sit up and see who or what was attached to the feet, I couldn't even shout for my parents I was so scared. I lay there, heart thumping, getting nudged now and then by the feet. Eventually I must have fallen asleep. I have no explanation and I've never encountered them since.
The second odd thing that has happened to me was an incredibly vivid dream. I'm not going to try claim it as a ghost or anything, just as one of those weird things that the human brain sometimes does. DH and I were renting a crappy little flat and one night I had this crystal clear dream about it. I was in our flat but the decor was wrong. Brown carpet and orange curtains, brown sofa, the balcony railing painted green, one of those 70s blankets on the bed where is like a load of cordstrings sewn together - candlewick? - and I wasn't me, I was a different woman. I lived there with my boyfriend but I was cheating on him. One afternoon we had a huge argument and there was a scuffle. I stubbed my cigarette out on his arm and he stormed out. I was so angry and I hated him but I couldn't simply leave him. When he came home I'd hidden my other man in the bathroom, while I was talking to him the OM snuck through and stabbed him. Three times. Then shoved him to the floor, behind the sofa. At that point I woke up with a jump, utterly terrified, heart racing. And standing beside my bed was the boyfriend from the dream, the one who got stabbed. He was looking at me with a look of intense hatred. I closed my eyes, screamed for DH, and when I opened my eyes a second later it was gone. I've never had a dream like it, before or since, and I've never had a dream so vivd that it continues for a few seconds afterwards like that one did. Even now, ten years later, I can recall every detail of it. I can remember exactly what the boyfriend looked like when he was stood next to the bed - jeans, a black T-shirt, a denim jacket with a sheepfleece collar, brown eyes, brown, slightly curly hair, in need of a cut. It was very strange.
The last one is something that a happened when we went to Barley Hall in York. The place was pretty much empty and DS, then aged 1, was enjoying having a toddle around the place. We were down in the hallway outside the buttery and there's a staircase leading upwards with an open railing alongside. DS started to crawl up the stairs so, laughing, I stuck my head through the railing and said "what you doing!?" in a funny voice. As soon as the words were out of my mouth I heard a rustling behind me and then a woman whisper-hissing to me in a rushed, urgent ton, questioning what was I doing down here/there. I leapt a mile, grabbed DS, and moved to a different part of the house. DH followed, splitting his sides laughing at me. He'd heard it too and pointed out to me that there were speakers all over the place, playing sounds and voices. I felt like a complete idiot and laughed too. When we got back to the entrance we hung around the shop for a bit because it was chucking down outside. We were chatting to the two ladies working there and told them what had happened. They very nicely explained that there are no speakers in the buttery and thanked me for sharing as they were locking up that night and now had that a knowledge on their minds! They also said that usually peoewpele got funny photographs rather than hearing voices. When we checked our photographs we didn't have anything odd in the ones taken in the buttery but one of the ones taken from the balcony, looking down, had a vertical streak of light in it. At first I thought it was a reflection from a doorknob but when I zoomed in, the light is actually a little way in front of the door knob and not in line with it so isn't a reflection at all.